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CHEMISTRY 20 FINAL EXAM

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CHEMISTRY 20 FINAL EXAM What makes up the atom? - correct answer -A tiny positively charged nucleus surrounded by a cloud of negatively charged electrons. Where is the mass of an atom mostly from? - correct answer -The nucleus consisting of protons and neutrons. What is an isotope? - correct answer -An element that has a different amount of neutrons but the same amount of protons and neutrons. What is group 1 on the periodic table of elements? - correct answer -Alkali metals. What is group 2 on the periodic table of elements? - correct answer -Alkaline Earth Metals. What is group 17 on the periodic table of elements? - correct answer -Halogens. What is group 18 on the periodic table of elements? - correct answer -Noble Gasses What is the outer most level of electron shells? - correct answer -Valence Electrons. What is included in lewis dot diagram? - correct answer -The 8 possible valence electrons. When the valence electron shells has full electrons what is it called? - correct answer -Octet. What is unique about ionic compounds in the idea of conductivity? - correct answer -When they are dissolved in water they conduct electricity. What is the conductivity of covalent compounds? - correct answer -They do not conduct electricity. Name the diatomic elements? - correct answer -HIBrONCl

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